Hopefully, you're able to sort the problem out. I'd just like to reiterate what another user mentioned - SteamOS is really not meant for a desktop computer. It is made specifically for Steam hardware (steamdeck and steam machine) and other handhelds. They don't support it being used on a computer. They literally tell you this themselves too -

https://store.steampowered.com/steamos

"Users should not consider SteamOS as a replacement for their desktop operating system."

I saw another user give a great list of gaming-focused distros from Distrowatch and would highly recommend any one of them (Perhaps not Pop OS simply because their desktop Cosmic isn't quite ready yet for gaming, might be few releases off though hopefully). Personally I would recommend either Nobara or Cachy OS, have used both and both were brilliant.